In the near future, the federal government creates a committee to rid society of books it deems unsuitable. The libraries vow to protect their collections, and with the help of local governments, form a military group to defend themselves—the Library Forces! It's Valentine's Day, and Iku's hopes are dashed when Dojo, the guy she's been crushing on—and who's her Library Force superior!—receives an elegant box of chocolates from another woman. Romantic intrigue strikes the whole team as Shibazaki meets a would-be suitor and confides in Iku about her tortured love life. And it seems that Hikaru is being followed by someone from his past...